{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "Micellar nanoparticles were assembled from amphiphilic diblock copolymers composed of an ampholytic core - forming block and a redesigned polycationic corona block doped with thiol - reactive pyridyl disulfide groups to enable dual - delivery of antigens and immunostimulatory CpG oligodeoxynucleotide ( CpG ODN ) adjuvants ."}
{"Chemical": ["thiol", "pyridyl disulfide", "CpG"]}